linux/debian/patches/mixed-arch/0002-ZEN-Restore-CONFIG_OPTIMIZE_FOR_PERFORMANCE_O3.patch

From 1fc1195e784540ad1966b57267fc927a87c5d21d Mon Sep 17 00:00:00 2001
From: "Jan Alexander Steffens (heftig)" <heftig@archlinux.org>
Date: Sun, 11 Dec 2022 23:51:16 +0100
Subject: ZEN: Restore CONFIG_OPTIMIZE_FOR_PERFORMANCE_O3

This reverts a6036a41bffba3d5007e377483b425d470ad8042 (kbuild: drop
support for CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3), removes the
dependency on CONFIG_ARC and adds RUSTFLAGS.
---
 Makefile     | 3 +++
 init/Kconfig | 6 ++++++
 2 files changed, 9 insertions(+)

--- a/Makefile
+++ b/Makefile
@@ -812,6 +812,9 @@ KBUILD_CFLAGS	+= -fno-delete-null-pointe
 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
 KBUILD_CFLAGS += -O2
 KBUILD_RUSTFLAGS += -Copt-level=2
+else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
+KBUILD_CFLAGS += -O3
+KBUILD_RUSTFLAGS += -Copt-level=3
 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 KBUILD_CFLAGS += -Os
 KBUILD_RUSTFLAGS += -Copt-level=s
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1451,6 +1451,12 @@ config CC_OPTIMIZE_FOR_PERFORMANCE
 	  with the "-O2" compiler flag for best performance and most
 	  helpful compile-time warnings.
 
+config CC_OPTIMIZE_FOR_PERFORMANCE_O3
+	bool "Optimize more for performance (-O3)"
+	help
+	  Choosing this option will pass "-O3" to your compiler to optimize
+	  the kernel yet more for performance.
+
 config CC_OPTIMIZE_FOR_SIZE
 	bool "Optimize for size (-Os)"
 	help